Twyeb



RICHARD BREWER, OF PLYMOUTH, OHIO.

TWYER.

Specification of Letters Patent No. 2,857, dated November 21, 1842.

ToaZZ whom t may concern:

Be lit known that I, RICHARD BREWER, of*

Plymouth, in the county of Richland and State of Ohio, have invented anew and Improved Twyer-Iron for Blacksmiths Forges; and I do herebydeclare that the following is a full, clear, and exact description of myinvention, reference being had to the accompanying drawings, forming apart of this specification.

Figure l represents an inside view of my air box with the partitionplate (e), and back plate removed; Fig. 2, a view of the plate (e)detached; Fig. 3, a view of the back plate (g) detached; Fig. t, `a viewof the air box, in section showing the partition plates and tubes intheir proper places.

The nature of my invention consists in forming my air box into threedivisions, which I designate by the names of upper, lower and backchambers; I connect these chambers with each other; in such a manner asto produce a double reaction in the'box, before it is allowed to escapeto the tire.

To enable others skilled in the art, to construct and use my invention,I will proceed to describe its construction and operation.

My air box I make about ten inches thick, fourteen inches long, andbroad, of cast iron plates as thin as can be conveniently cast, and jointhem together with screws or in any suitable way. Around the inside ofthe box, and in the center, I form a rabbet (e) by making that part ofthe plates forming the back chamber half the thickness of those formingthe fro-nt chambers; on this rabbet or shoulder the plate (e) rests, andis made air tight with white leadv or putty. This plate separates theback chamber from the two front ones. From and at right angles to theplate (e) I place a second partition plate (7)) which forms the upperand lower chambers. On the back plate (g) there is a flange (a) whichiits air tight around the inside of the back chamber. Through the backplate passes a tube (c2) leading from the'nose of the bellows into theupper chamber. In the plate (e) on each side of the tub-e (02) is a hole(71, 71,) leading from the upper chamber to the back chamber. In thesame plate below, and opposite to the holes (L h) vare two tubes (0 0)leading from the back chamber into the lower cha1nber; the tubes (0 0')come flush with one side of theplate (e), but project on the other sidewithin one inch of the back plate (g). From the lower chamber there is afourth tube (c) leading from the lower chamber to the lire bed, andprojecting inside within one inch of the plate (e).

Then the box is put together and made air tight, and set in the brickwork of theV chimney, in contact with the tire bed, and

ythe tube (c2) attached to the bellows, it

is evident the air rushing from the bellows, through the tube (o2) intothe upper chainber, Vwill by its reaction against the plate (g) which isheated, be forced through the

